The core of your kit.

Castelli's Core Mesh Base Layer incorporates an update to the classic fishnet style design. While the older design used the holes of what felt like real fishnet to trap air between the skin and the second layer of clothing, the updated version uses a soft mesh that comfortably wraps your upper body as you ride.

However, with the new fully-open mesh design, it still serves to hold the jersey off of the skin. Essentially, this creates a layer of air between your skin and the jersey in order to help you maintain a constant body temperature. But, besides these thermo-regulating properties, the improvements that Castelli brings to the table are several. The mesh is made from a polyester hollow core fiber that's soft-to-the-touch, efficiently wicks away moisture, and has ample stretch. In terms of shape, Castelli calls this 'body wrap,' because it's designed to wrap the body so that the gaps are only in the mesh, not between the mesh and the body. Accordingly, the entire base layer is mesh, save the hems and the 'V' that resides just below the collar.

The Core Mesh is cut long in order to stay comfortably tucked inside your shorts and bibs. Additionally, it was constructed with minimal seams for a maximum level of comfort.

The Castelli Core Mesh Base Layer is available in the color White and in the sizes Small/Medium, Large/X-Large, and XX-Large.

Tech Specs

Material:

[body] mesh

Fit:

form fit

Recommended Use:

cycling, staying dry

Manufacturer Warranty:

30 days

Size chart

Castelli

Men's Apparel

Small

Medium

Large

X-Large

2X-Large

3X-Large

Chest

35.5 - 37in(90.2 - 94.0cm)

37 - 38.5in(94.0 - 97.8cm)

39 - 41in(99.1 - 104.1cm)

41 - 43in(104.1 - 109.2cm)

43 - 45in(109.2 - 114.3cm)

45 - 47in(114.3 - 119.4cm)

Waist

29.5 - 31.5in(74.9 - 80.0cm)

31 - 33in(78.7 - 83.8cm)

33 - 35.5in(83.8 - 90.2cm)

35.5 - 37.5in(90.2 - 95.3cm)

38.5 - 40.5in(97.8 - 102.9cm)

41 - 43in(104.1 - 109.2cm)

Hips

36.5 - 38.5in(92.7 - 97.8cm)

38 - 40in(96.5 - 101.6cm)

40 - 42in(101.6 - 106.7cm)

42 - 44in(106.7 - 111.8cm)

44 - 46in(111.8 - 116.8cm)

46 - 48in(116.8 - 121.9cm)

Inseam

31.5in(80.0cm)

32in(81.3cm)

32.3in(82.0cm)

32.8in(83.3cm)

33in(83.8cm)

34.8in(88.4cm)

How to Measure:

For best results, take measurements over your underwear.

Chest:

Measure under your arms, around the fullest part of your chest.

Waist:

Measure around your natural waistline, keeping the tape a bit loose.

Hip:

Measure around the fullest part of your body at the top of your legs.

Inseam:

Using pants that fit well, measure the crotch seam to the bottom of the leg.

Here's what others have to say...

View

Works great

PROS: This baselayer garment is designed to keep you cool in warm weather by holding your jersey off your skin. This promotes sweat evaporation and cooling.

CONS: Opening for the head is very small. No big deal (though I hope Castelli fixes this in the next version). Just take care in working this baselayer over your head. ... Yes! Dan P is so right below. This t-shirt is totally open fishnet. Only wear this garment alone in front of your GF or wife! (even then)

Every serious rider should consider using a baselayer like this in warm weather.

This baselayer and Castelli's "Climber's Jersey" make an AWESOME combination.

Comment on John Heineken's review:

Good product

Familiarity:
I've used it several times

I bought this about a few weeks ago and have used it several times so far under a couple different jerseys. It does almost exactly what the description says. I have noticed my temperature staying a bit more constant, and it definitely does a great job wicking away sweat. The only thing, be ready for how meshy it is. The picture just cannot prepare you for how see-through it is. Granted, it is a base layer, but just be warned.